Explosion-engine.



0. F. JENKINS. EXPLOSION ENGINE.

APELIOATION FILED DEO.4, 1909.

Patented Oct. 11, 1910.

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IIWENTOR' inder.

UNITED STAWENT OFFICE.

CHARLES FRANCIS JENKINS, OF WASHINGTON, DISTRICT OF COLUMBIA.

EXPLOSION-ENGINE.

To all whom it may concern:

Be it known that I, CHARLES FRANCIS JEN- KINS, a citizen of the UnitedStates, residing at Vashington, District of Columbia, have inventedcertain new and useful Improvements in Explosion-Engines, of which thefollowing is a specification.

This invention relates to that class of apparatus known as gas en ines,and has for its main object -.a more e cient construction, especially inengines of the two-cycle type.

[n the drawings, Figure 1 is a sectional view, with the piston at thebeginning of its working stroke and 1*ig.-2,'a sectional view with thepiston at the .end of its working stroke.

In both the drawings like symbols refer to like parts in Which A is acylinder having an enlarged portion A, in which the parts B and B,respectively of the piston, work. Between the parts of the cylinderthere is an abrupt annular offset and there is a like or'correspondingoifset between the parts of the piston. Piston B is connected by crankarm C to crank I). Valves E and F open, respectively, into and out ofthe cylinder, and spark plug G is located in operative position in theenlarged portion A of the cyl- H represents tubular means (the subjectof application, Serial No. 529,736) for suppressing back-firing in thetransfer passage leading from the opening covered by valve F to theinlet port The port J is the exhaust port.

The operation of the engine is as follows: A gaseous mixture is suckedinto the cylinder A past the valve E on the downward stroke of thepiston B. This charge is driven (on the return stroke) into the transferpassage past the valve F, which latter catches and holds the chargetrapped in the transfer passage until the piston has completed itssecond downward stroke, when, as the port I uncovers, the charge rushesinto the cylinder space A. On the second upward stroke of the pistonthischarge is compressed, and thereupon fired by the spark at the points ofthe plug G, producing a power stroke. This cycle of events continues aslong as the gas supply continues, and the igniting spark explodes it. I

In simplest terms, the top of the piston acts'as. a pump for supplyinggas, under Specification of Letters Patent.

Patented Oct. 11, 1910.

Application filed December 4, 1909. Serial No. 531,362.v

the highest power or both combined; and a long crank arm, with theimpact of the explosion applied below'the upper end of the arm.

Having thus described my invention, what I claim'as my invention, andwish to protect by Letters Patent of the United States, is:

1. In a gas engine, the combination with a power cylinder having asmaller axial ex tension forming a compression chamber and a transferpassage. leading from the end portion of the compression chamber to theopposite end of the working chamber and adapted to contain a workingcharge, of a power piston'working in the power cylinder, provided withan axial extension working in the compression chamber and itselfarranged to uncover the transfer passage in nearing the limit of itsworking stroke, and a check valve preventing the return of thecompressed charge from said passage into said compression chamber. j

2. Ina gas engine, the combination with a power cylinder having an axialextension of less diameter forming a compression chamber, of a powerpiston fitting the power cylinder and having an axial extension fit-'ting the compression chamber, said power cylinder being provided withValveless inlet and exhaust ports near the outer limit of the powerpistons path and said extension, with valved induction and eductionports near the opposite end of the compression 'chamher, and with a assae leading from said eduction port to t e in ct port, substantially asset forth. v

3. In a gas engine, the combination with a' power cylinder and analining compression chamber of less diameter forming an extension of thesame, of a piston working in said cylinder and provided with anextension projecting centrally from its working face and working in thecompression chamber, saidcylinder having near the outer limit of thepathof said face inlet and exhaust ports and said chamber having near theinner limit of the path of the pistons exten- -si0n a valved inductionport and a valved I the eduction .valve into said conduit, and

eduction port communicating with a conon its power stroke uncovers bothinlet and 10 'duit leading to said inlet port, and means exhaust portsand sucks'a charge into the for preventlng flame from passing throughcompression chamber.

said conduit; whereby the return stroke of CHARLES FRANCIS JENKINS. thepiston compresses a charge in the power \Vitnesses: cylinder and also afuture charge in the B. H. DAILEY,

compression chamber, forcing the latter past JAMES L. CRAWFORD.

